STEEL MATERIAL; ZINC PLATED FINISH; 7/8 INCH MAX. JAW CAPACITY; .875 MAX. JAW CAPACITY - DECIMAL; 7/8 MAX. JAW CAPACITY - FRACTIONAL; 600 LB LOAD CAPACITY; 600 LOAD CAPACITY IN LB; B-LINE. BRAND; SUPPLIED WITH SCREW YES; SCREW TYPE SQUARE HEAD